चिकित्सा शिक्षा आयोग (CEE) एमबीबीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – एमबीबीएस प्रवेश परीक्षा
CEE – MBBS Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Temporary hardness of water is due to the presence of: (a) Calcium bicarbonate (b) Magnesium sulfate (c) Calcium chloride (d) Iron oxide
सही उत्तर: क) (a) Calcium bicarbonate
Temporary hardness arises from the dissolved bicarbonates of calcium and magnesium. These carbonates react with acids to form soluble salts that are removed during boiling. The other options contribute to permanent hardness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The colour of most transition metal ions in aqueous solution is due to: (a) Presence of hydrogen ions. (b) Formation of complex ions with different oxidation states. (c) Absorption of light by the metal atoms themselves. (d) Reaction with water molecules.
सही उत्तर: ग) (c) Absorption of light by the metal atoms themselves
Transition metals exhibit variable oxidation states and form colored complexes. These complexes absorb specific wavelengths of light, leading to a characteristic color in solution. The other options are incorrect as they don't explain the fundamental reason for the observed colors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A lens has a focal length of 50 cm. What type of lens is it? (Use g=9.8m/s²)
सही उत्तर: क) Converging Lens
A positive focal length indicates a converging lens, which refracts light rays towards each other to converge at the focal point. The other options are incorrect as they describe lenses with negative focal lengths or those that do not focus light.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The refractive index of a glass is 1.5 for light traveling in air and 1.6 for light traveling through the glass. What is the speed of light in glass? (Speed of light in air = 3 x 10^8 m/s)
सही उत्तर: ग) 2.5 x 10^8 m/s
The refractive index (n) is defined as the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v): n = c/v. Therefore, v = c/n = (3 x 10^8 m/s)/1.6 = 1.875 x 10^8 m/s. The closest answer is 2.0 x 10^8 m/s.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A wave is traveling along a stretched string. The frequency of the wave is 200 Hz and its wavelength is 1.5 m. What is the speed of the wave? (Use g = 9.8 m/s²)
सही उत्तर: ख) 600 m/s
The speed of a wave is calculated as wavelength multiplied by frequency (v = λf). Here, v = 1.5m * 200Hz = 300 m/s. The other options are incorrect because they do not correctly apply this fundamental formula.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The ‘floating ribs’ of mammals primarily provide: (a) Attachment points for muscles (b) Structural support to the vertebral column (c) Protection for internal organs in the thoracic cavity (d) Increased bone density for strength
सही उत्तर: घ) (d) Increased bone density for strength
The floating ribs (specifically the 11th and 12th ribs) are uniquely attached to the sternum via their own individual ligaments, creating a space that houses the major blood vessels and parts of the diaphragm. This provides crucial protection.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In gymnosperms like pines, pollination is often facilitated by: (a) Bees (b) Wind (c) Hummingbirds (d) Bats
सही उत्तर: ख) (b) Wind
Pine cones are adapted for wind pollination. The structure of the cone and its release mechanism relies on air currents to disperse pollen effectively. Options (a), (c) and (d) represent pollinators associated with angiosperms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The primary function of phloem sieve cells is: (a) Water conduction (b) Transport of sugars and other organic nutrients (c) Support and rigidity of the plant stem (d) Storage of starch and proteins
सही उत्तर: ख) (b) Transport of sugars and other organic nutrients
Phloem sieve cells are specialized cells dedicated to the efficient transport of sugars (primarily sucrose) produced during photosynthesis throughout the plant. Water conduction is primarily the role of xylem vessels. Options (c) and (d) describe functions of other cell types.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following correctly describes the role of CAM photosynthesis in plants like Opuntia? (a) It occurs primarily during daylight hours with a high rate of carbon dioxide fixation. (b) It involves rapid CO2 uptake and cyclic regeneration of RuBP. (c) It’s characterized by temporal separation of carbon assimilation and decarboxylation, concentrating CO2 in succulent stems and leaves. (d) It relies solely on C4 photosynthetic pathways.
सही उत्तर: ग) (c) It’s characterized by temporal separation of carbon assimilation and decarboxylation, concentrating CO2 in succulent stems and leaves.
CAM photosynthesis (Crassulacean Acid Metabolism) is distinct due to the temporal separation of carbon fixation and decarboxylation. Opuntia, a cactus, exemplifies this adaptation with CO2 concentrated in its succulent stem. Options (a), (b) and (d) describe different photosynthetic pathways or processes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The process of exine formation in pollen grains is a result of: (a) Meiosis (b) Mitosis (c) Fragmentation (d) Pollen tube development
सही उत्तर: ख) (b) Mitosis
The exine (outer wall) of pollen grains is formed during mitosis and subsequent cell divisions. Options (a), (c) and (d) describe other processes involved in pollen development; however, it's the mitotic process that directly generates the cells which form the protective layer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।